Weft inserting apparatus in multiple looms



July 16, 1968 R. B. GOLOBART 3,392,756

WEFT INSERTING APPARATUS IN MULTIPLE LOOMS Filed June 13, 1966 2 Sheets-Sheet 1 mun lillllllllml-u- INVENTOR RAMON 814M605? GOLOBART July 16, 1968 R, B. GOLOBART 3,392,756

WEFT INSERTING APPARATUS IN MULTIPLE LOOMS Filed June 13, 1966 2 Sheets-Sheet 2 I NVENTO R RAMON BA M6051? GOZOBAAT United States Patent 3,392,756 WEFT INSERTING APPARATUS IN MULTIPLE LOOMS Ramon Balaguer Golobart, Calle Caspe 86, Barcelona, Spain Filed June 13, 1966, Ser. No. 556,981 Claims priority, appliflatioggspain, June 22, 1965,

4 Claims. (cl. 139-'-1z2 ABSTRACT OF THE DISCLOSURE The present invention relates to a new weaving system in shuttleless looms.

There exist various systems for substituting the shuttle by weft thread inserting elements, such as fluid driven weft inserters, for example by compressed air, or weft gripping members actuated from the exterior of the loom by mechanical means.

The results obtained by the known systems are not sufiiciently advantageous for achieving a maximum yield in the textile production.

There exist looms in which, for increasing the production with one single weft thread inserting member, this member is inserted simultaneously into two sheds, one arranged in continuation of the other, but these looms have the disadvantage that the loom sleys and all the mechanical elements work alternatively, and in case of necessity of a healds actuating dobby, this latter should be doubled also.

In general, the weft thread inserting elements, being either fluid driven members, tapes or rigid weft carrying members, need to be guided, thus giving rise to excessive frictions, consumption of unnecessary driving power and complication of mechanisms, and, therefore, to losses in the yield of the textile production. 7

It is an object of the present invention to avoid these disadvantages and to increase considerably the production, working regularity, diminution of the consumption of driving power and to produce an economic and in size proportionally reduced loom.

Another object of the present invention consists in obtaining, with one single motor drive, a double insertion of weft threads in counter sense and symmetrically in two loom bodies at a time, in such a manner that the insertion is convergent in the moment the weft thread inserting elements leave the shed and divergent when these elements enter into the shed to meet the corresponding stationary weft thread reserves, or inversely when for gaining space, the stationary bobbins are arranged at the entrance side of the weft thread inserting elements in the respective sheds, i.e., between the two loom bodies, and the weft thread is to be inserted from the inside to the outside.

The provision of these weft thread inserting elements allows of constituting two identical sheds at a time, requiring only one dobby for actuating the healds of every loom body in contrast to the known double looms in which two dobbies are necessary.

Due to the fact that the sheds are formed identically 3,392,756 Patented July 16, 1968 "ice and simultaneously there is provided a single loom sley control for actuating simultaneously the two reeds of the loom, one in each loom body, as well as a single control for actuating simultaneously the other loom elements, for the production of the two fabrics.

According to the invention, the weft thread inserting elements are moved in convergent and divergent sense by means of the impulsion caused by the continuous revolution of a driving shaft, actuated by any known means, through two connecting rods, a secondary one and a driving one, which on their travel around a stationary toothed disc through a planetary pinion geared with an intermediate planetary pinion, are caused to extend and contract, so that on each revolution of the driving connecting rod and the planetary pinions, one cycle of the weaving operation is effected. Such an assembly constituted by a stationary toothed disc and two connecting rods mounted on the driving shaft together with two planetary pinions, is provided, in opposed senses, for each of the two weft thread inserting elements, so that the continuous revolution of the said connecting rods and of their planetary pinions around the corresponding stationary toothed discs cause the convergent and divergent movement of the two weft thread inserting elements, the uniform and continuous repetition of which determines the simultaneous formation of two fabrics.

Another advantage of the invention is that an easy graduation of the width of the fabrics may be obtained by adjusting the pivoting pins of the two connecting rods, the driving one and the secondary one, in respective guiding slots provided at the contiguous ends of both connecting rods. The intermediate planetary pinions which gear with the driven planetary pinions secured to the driving connecting rods assure by their continuous travel around the stationary toothed discs that the weft thread inserting elements are moved in a completely rectilinear position, so that any guide member which otherwise would have been necessary for their correct position, may be avoided.

A specific embodiment of the invention will now be described by way of example with reference to the accompanying drawings, in which:

FIG. 1 is .a schematic front view of a device, embodying the principles of the present invention, this device showing the weft thread inserting elements in divergent position after having entirely passed through their respective sheds to meet the stationary weft thread reserves (not shown);

FIG. 2 is a schematic front view of the same device showing the Weft thread inserting elements in the beginning return position gripping the weft threads (not shown);

FIG. 3 is a schematic front view of the device showing the weft thread inserting elements in the middle of their return trip gripping the weft threads (not shown);

FIG. 4 is a schematic front view of the device showing the weft thread inserting elements in convergent position after having completely left the two sheds and released the inserted weft threads (not shown);

FIG. 5 is a side elevation-a1 view of FIG. 3 showing the double elements;

FIG. 6 is a schematic front View of a loom having a control device of weft thread inserting means actuating on two loom bodies, said weft thread inserting means being shown in a divergent position as in FIG. 1, ready for gripping the threads of the stationary reserves; and

FIG. 7 is a schematic front view of a loom having a control device of weft thread inserting means actuating on two loom bodies, said weft thread inserting means being shown in a convergent position as in FIG. 4, ready for releasing the weft threads.

Referring to these figures 1 shows the driving shaft moved rotatably by any known control device; 2, 2 are two stationary, equally toothed discs which are secured to a support member 3; 4, 4' show the driving connecting rods which bear the intermediate planetary pinions 5, 5' engaging the outer periphery of the stationary toothed discs 2, 2' and adapted to effect a rotational uniform movement around them. The intermediate planetary pinion 5 gears with the planetary pinion 6 secured to the secondary connecting rod 7 and which on its travel around the disc 2, moves the weft thread inserting element 8 pivoted at its extreme end 9 to the secondary connecting rod 7. Simultaneously, the intermediate planetary pinion 5 gears in opposed position with the planetary pinion 6' secured to the secondary connecting rod 7' and which, on its travel around the disc '2 moves the weft thread inserting member 8' pivoted at its extreme end 9' to the secondary connecting rod 7. The continuous rotation of the planetary pinions 5, 6 and 5, 6' around the stationary toothed discs 2, 2, fixed to the support member 3, causes a uniform operation cycle of the two weft thread inserting elements 8 and 8, convergent during one half a revolution and divergent during the second half of rotation.

The two intermediate planetary pinions 5, 5', which gear with the driven planetary pinions 6, 6' mounted on the driving connecting rods 4, 4, assure by their continuous travel around the stationary toothed discs 2, 2' that the weft thread inserting elements 8, 8' are moved in a completely rectilinear position, so that any guide member for their correct position may be avoided.

The driving connecting rods 4, 4' are provided at their extreme ends 10, 10' with rectilinear guiding slots 11, 11' to adjust the position of the shafts 12, 12' of the driven planetary pinions 6, 6', the said shafts being adjustably secured to the extreme ends of the secondary connecting rods 7, 7. The driving connecting rods 4, 4' are further provided with curved guiding slots 13, 13' to adjust the position of the shafts 14, 14' of the intermediate planetary pinions 5, '5' to the required distances from the shafts 12, 12 of the planetary pinions 6, 6. This adjustment serves for varying the depth of the path of the weft thread inserting elements 8, 8 in accordance with the width of the fabrics to be produced.

FIGS. 6 and 7 show a multiple loom having one single dob'by 15 actuating simultaneously the healds 16, 16 of each loom body, in which the weft thread inserting elements 8, 8 have passed through their respective sheds to meet the corresponding weft threads 17, 17' (FIG. 6), to clamp them and to insert them into the sheds, as well as to release them when the total convergency between the weft inserting elements occurs (FIG. 7), so as to be picked at a time by the reeds 18, 18' which actuate simultaneously in both loom bodies.

I claim:

1. In a multiple loom including two loom bodies with their respective sheds, healds, reeds, and sleys, common control means for the mechanical elements in said bodies, and a single dobby actuating said healds, needle drive means between said loom bodies and comprising a single motor drive, two parallel straight weft thread inserting elements, and a planetary mechanism driving said elements for inserting the weft threads concurrently and symmetrically in the two l-oom bodies, said elements being substantially simultaneously driven towards each other when they leave their respective sheds and away from each other when they enter their respective sheds.

2. A needle drive as claimed in claim 1 wherein said planetary driving mechanism comprises a driving shaft, a stationary toothed disc, and for each of said two weft thread inserting elements a connecting drive comprising an intermediate planetary pinion engaging the periphery of said disc, a second planetary pinion driven by said intermediate pinion, a driving rod actuated by said driving shaft and bearing said intermediate pinion, and a second rod connecting said second pinion to the respective weft inserting element, said two connecting drives being so positioned that the revolution of said driving shaft moves the thread inserting elements alternately in convergent and divergent sense, each rotation of the driving rods and pinions effecting a cycle of the weaving operation.

3. A needle drive as claimed in claim 2 comprising guiding slots provided at the contiguous ends of said driving rod and second rod, and pivoting pins in said slots to connect firmly said rods in the position required for the width of the fabrics to be woven.

4. Multiple loom as set forth in claim 2, characterized in that the intermediate planetary pinions which gear with the driven planetary pinions secured to the driving connecting rods assure by their continuous travel around the stationary toothed discs that the weft thread inserting elements are moved in a completely rectilinear position, so that any guide member for their correct position may be avoided.

References Cited UNITED STATES PATENTS 2,818,882 1/1958 Haberhauer 139123 3,291,159 12/1966 G-agliardo 139124 798,472 8/1905 Milmsen 139-188 XR FOREIGN PATENTS 511,619 1/1955 Italy.

OTHER REFERENCES Ger. App. No. 1,078,955, Haberhauer, November 1954, 139/ 123.

HENRY S. JAUDON, Primary Examiner. 

